A scale-model of an absorption column is to be tested. The problem of interest is that of air flow around the column. Since this is a low-speed problem, the Reynolds number is to be held constant between the model and the full-scale column. The model is to be one-tenth the height of the column with the same shape. The design wind speed for the full-size column is 60mph. How fast (mph) should the air in the wind tunnel move past the model to have the same Reynolds number? Suppose we could test the model in water; what should the water velocity be for the same Reynolds number